/Engine/Plugins/MeshPainting/Source/MeshPaintingToolset/Public/MeshPaintHelpers.h
Sets the specific (LODIndex) per-instance vertex colors for the given StaticMeshComponent to a single Color value
void SetInstanceColorDataForLOD ( [UStaticMeshComponent](API\Runtime\Engine\Components\UStaticMeshComponent) * MeshComponent, int32 LODIndex, const [FColor](API\Runtime\Core\Math\FColor) FillColor, const [FColor](API\Runtime\Core\Math\FColor) MaskColor )